I had not tried that.
I can raise this with lasergist to see what they think of this. Probably can be considered a bug, but does not seem like a major one since you won't be ordering anything if you buy that.
It was something I was looking at when I saw that the order button included all the parts for a sandwich plate. I wanted to see what each plate was going to cost me individually. I wanted to make a judgement call on what it would cost me to cut out the other pieces. Thus, I zero'ed everything out. Maybe show an itemized quote?
The auto-quoting came in slightly higher than what I could get from their website or through e-mail. The quote for the top plate came in at ~$101. I paid $99 for a similar board with more holes than what was in that screenshot, and if I hacked the form fields on their website to accept sizes greater than 300mm, I was quoted $96.
Finally, I know the hole UI will solve this, but as of right now, the only way to get a plate with holes is to use the sandwich case option. That means we get the inner layers generated and quoted from LG as well as the top and bottom. I don't know about everybody else, but I would never pay what they are charging for an inner layer (especially when you need multiples). Does it make sense to quote those layers by default? Maybe a short term solution would be to add a sandwich case option that didn't include the inner layers?